Nitrous oxides gas adsorbing substance and preparation method thereof
A gas adsorbent, nitrogen oxide technology, applied in chemical instruments and methods, separation methods, other chemical processes, etc., can solve problems such as low air velocity of processing gas, achieve high-efficiency adsorption, and improve adsorption capacity.
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[0031] Example 1
[0032] The preparation steps of nitrogen oxide gas adsorbent are as follows:
[0033] Prepare 3 mL of dilute nitric acid with a concentration of 30% by volume, measure 2.5 g of husk charcoal with 20 to 60 meshes as activated carbon, pile it on the watch glass, soak it with dilute nitric acid drops for 0.5h, wash it to neutrality, and put it in a 150℃ oven Dry for 1h;
[0034] Prepare 3 mL of KOH solution with a concentration of 25% by volume, drop the solution on the dried activated carbon and soak for 1 hour, and then dry it in an oven at 60°C for 3 hours;
[0035] Prepare 3 mL of copper nitrate solution with a concentration of 5% by mass, drop the solution on the dried activated carbon and soak for 0.5h, and then dry it in an oven at 250℃ for 3h. The final active component CuO accounts for the nitrogen obtained in this example. The total mass percentage of the oxide gas adsorbent is 3%.
[0036] The performance evaluation of Example 1 was carried out in a U-sh...
Example Embodiment
[0039] Example 2
[0040] Prepare 3 mL of dilute nitric acid with a volume percentage concentration of 10%. Measure 2.5g of coal-based charcoal with 20 to 60 mesh as activated carbon and pile it on a watch glass, add dilute nitric acid dropwise to it, soak it for 1 hour, wash it to neutrality, and dry it in an oven at 100°C for 2 hours;
[0041] Prepare 3 mL of KOH solution with a concentration of 25% by volume, drop the solution on the dried activated carbon and soak for 1 hour, and then dry it in an oven at 60°C for 3 hours;
[0042] Prepare 3 mL of copper nitrate solution with a concentration of 5% by mass, drop the solution on the dried activated carbon and soak for 0.5 h, and then dry it in an oven at 250° C. for 3 h. The final active component CuO accounts for 3% of the total mass percentage of the nitrogen oxide gas adsorbent prepared in this embodiment.
[0043] Example 2 The performance evaluation was carried out in a U-shaped glass tube reactor, and the reaction gas volu...
Example Embodiment
[0046] Example 3
[0047]Prepare 3 mL of dilute nitric acid with a volume percentage concentration of 30%. Measure 2.5g of 20-60 mesh wood charcoal as activated carbon and pile it on the watch glass, add dilute nitric acid dropwise on it, soak it for 0.5h, wash it to neutrality, and dry it in an oven at 150℃ for 1h;
[0048] Prepare 3 mL of KOH solution with a concentration of 5% by volume, drop the solution on the dried activated carbon and soak for 2 hours, then dry it in an oven at 100°C for 2 hours;
[0049] Prepare 3 mL of ferric nitrate solution with a concentration of 4.5% by mass, drop the solution on the dried activated carbon and soak for 0.5h, and then dry it in an oven at 250°C for 3h. Final active component Fe 2 O 3 The total mass percentage of the nitrogen oxide gas adsorbent prepared in this embodiment is 3%.
[0050] The performance evaluation of Example 3 was carried out in a U-shaped glass tube reactor, and the reaction gas volumetric space velocity (GHSV) was 75...
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